Spanner wrench for waterproof watches



April 15, 1947- R. A. WILLIAMS 2,418,999

SPNNER WRENCH FOR WATERPROOF WATCHES Filed Jan. 15,` 1945 INVENTOR. /QOEfRf// h//L L /A/ws.

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jatented pr. 15, 1947 UNITED STATES PATENT oFFlcE SPNNER WRENCH FOR WATERPROOF WATCHES Robert A..Williams, Denver, Colo.

Application January 15, 1945, Serial No. 572,828'

.watches have their backs threaded into the cases,

and the backs are formed with a variety of types of' wrench-receiving devices. Each watch manufacturer furnishes a special wrench to -t his particular type of watch back, thus requiring the vusual watchmaker to carry an infinite. variety of wrenches in order to service all types of watches.

The principal object of this invention is to provide a single universal wrench, by means of which all of the present-known varieties of waterproof watch backs may be removed and replaced.

Other objects and advantages reside in the detail construction of the invention, which is. deL signed forsimplicity, economy, and ,eiiciency These will become more apparent vfrom the following description.

In the following detailed description of the. invention, reference is had rto the accompanying drawing which forms a part hereof. Like nuvmera'ls refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. l is a topi-view ofthe improved wrench;

Fig. 2. is a longitudinal section therethrough taken on the line 22, Fig. l;

Fig. 3 is a bottom view of the wrench as it would appear when set tov accommodate a given type ofwatch back; and

Figs. 4, 5, 6, and '7 illustrate four of the many types oi watch case backs which the improved Wrench. will accommodate.

The improved wrench consists of a relatively flatelongated handle member I@ having a hanging opening I I in one extremity and a stationary fulcrum pin I2 formed on or secured in the other extremity so as to project at right angles to the plane of the handle. A longitudinally extending slot I3 is formed along the centerline of the handle member I adjacent the fulcrum pin I2.

A pin disc I4 is detachably secured against the lower face of the handle member lll by means of a threaded stud I5, which extends upwardly through the slot I3, terminating in a thumb nut A slide plate I1 is positioned between the handle member I and the nut I6. The plate I1 is provided with a suitable opening for the passa-ge of the stud I5 and is formed with ears I8 which are bent around the handle member IJ to maintain the plate I1 in alignment therewith as it is slid longitudinally therealong. One extremity (Cl. Sl-G'l 2 of the slide plate I1 is turned upwardly tooform a thumb-engaging tab I9.

Four back-engaging pins 2li, 2l., 22,'and 23 are lixed'in, and extend downwardly from the pin plate i 1li. A locking pin 24 is. aixed in the slide plate l1 forwardly of the studr I5 and extends downwardly throughv the slot |13 sufficiently far to engage in locking holes 25, 2.6, and 21 in the plate I4. Each of the pins l2, 2b, 2l, and 23 terminates in a relatively small entering point 23.

The pinsl 2B and 2| are positioned 90 apart around the axis. of the stud I5: and the pins 22 and 23 are positioned 120 apart around the same axis.

ku; Tov assist in describing the use of the wrench,

several typical Watch backs are illustrated. A typical watch back .29 is illustratedv in. Fig.. 4, having .notches 35i formed in its peripheral edge at 120' intervals'. Other backs` have intermediate notches, as indicatedin broken line. at 3;Iv at 60 intervals, Still other Watch backs of this type have twoA or four notchesset at: intervals of 180 or Sil", respectively.. f

Another form of watch back. is illustrated: at

25 33, in Fig.. 5-y having a plurality of flat wrench faces 34, The backs 33 in some instances have twelveY faces 34 as illustrated, and in other instanceshave six,.eight, or sixteen faces;

A different type of' Watch back is illustrated at 35i in Fig. 61 having ltwo Spanner wrench. depressions 35 placedopposite each other in the back. Other backs of this. typeI have four spanner wrenchr depressionsr positioned suchasv indicated in broken line at 31..

35 A fourth` form of watchA back is illustrated at 331 in Eig. T, having`V arcuate indentations 39; in its periphery. 0n some watches theindentati'ons 39? are at 30 intervalsr and onl others: at 45' intervals'.`

40 The improved wrench is designed for use on all of the above types of watch backs, in addition to others not shown. I

For use on the back 32 with the notches 36 at 30 or 60 intervals, the pin plate I4 is rotated to place the locking hole Ml over the locking pin 24. This places the pins 22 and 23 opposite the pin I2, the three being spaced at 60 intervals. The point 28 of the pin I2 is engaged in a notch 30 on the far side of the back and the slide plate I1 is pressed forwardly with the thumb against the watch back and can be readily used for removing and replacing the latter, with the handle I acting as a lever. Should the back have the additional notches 3I, the latter are not used, since the pins need only to engage the alternate notches 30.

Should the watch back 32 have its notches 30 spaced at 45 or 90 intervals, the pin plate I4 is rotated to place the locking hole 26 over the locking pin 24, as shown in Fig. 3. This places the 90 pins 2U and 2| in position to cooperate with the fixed pin I2. The pins are then adjusted to the notches by manipulation of the slide plate, as previously described. Should the back 32 have only two, oppositely-placed notches, the pin plate I4 is rotated to place the locking hole 25 over the pin 24. This places the pin 23 directly opposite the pin 23 so that they will engage notches on opposite sides of the back when forced thereagainst by pressure on the thumb tab I9.

For use on the back 33 the same procedure is followed, that is, the pins 20 and 2I are used on backs having eight or sixteen faces 34, and the pins 22 and 23 being used on backs having six or twelve of the faces 3d. The pins are forced snugly against the faces by pressure on the thumb tab and are locked in the engaged position, as indicated in broken line in Fig. 5, by means of the thumb nut I6.

For use on the watch back 35, the plate I 4 is rotated to bring the hole 25 over the stud 24 to bring the pins I2 and 23 into alignment so that they may be inserted in the two depressions 36. The proper spacing is obtained by shifting the slide plate I'I before the thumb nut I 6 is tightened. This same procedure applies regardless of the. number of depressions 3B and 3l in the watch back 35.

For use on the back 38 the plate I4 is rotated to bring either the two pins 20 and 2| or the two pins 22 and 23 into place in the indentations 39, as shown in broken line in Fig. 7. The choice of pins, of course, depends upon the spacing of the indentations. The operation on this type is very similar to that on the back 32 of Fig. 4.

While a specic form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention,

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

1. A wrench for rotating watch case backs comprising: an elongated handle member; a rst pin projecting from one extremity of said handle member at right angles to the axis of the latter; a pin plate; ya pivot stud extending from said pin plate through an elongated slot in said handle member; a clamping nut on said stud acting to clamp said plate to said handle member; and a second pin projecting from said pin plate with its axis parallel to the rst pin and eccentric of said stud.

2. A wrench for rotating watch case backs comprising: an elongated handle having a longitudinally extending slotted opening; a pin projecting from said handle adjacent one extremity thereof and at right angles to the plane thereof; a pin plate positioned against one face of said handle member; a pivot stud projecting from said pin plate through said elongated opening; a slide plate engaging the other face of said handle member, said stud passing through said slide plate; a nut on said stud acting to clamp said slide plate and said pin plate to opposite sides of said handle member; wrench pins projecting from said pin plate parallel to said rst pin, said wrench pins being placed t0 one side of the axis of said stud; and means extending from said slide plate to said pin plate through said elongated opening for locking said pin plate at pre-set circumferential' positions.

3. A wrench for rotating watch case backs comprising: an elongated handle having a longitudinally extending slotted opening; a pin projecting from said handle adjacent one extremity thereof and at right angles to the plane thereof; a pin plate positioned against one face of said handle member; a pivot stud projecting from said pin plate through said elongated opening; a slide plate engaging the other face of said handle member, said stud passing through said slide plate; a nut on said stud acting to clamp said slide plate and said pin plate to opposite sides of said handle member; wrench pins projecting from said pin plate parallel to said first pin, said wrench pins being placed to one side of the axis of said stud; and a locking pin extending from said slide plate through said elongated opening, there being openings in said pin plate for receiving said locking pin to locate and lock the former at predetermined circumferential positions.

ROBERT A. WILLIAMS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

